- Haworthia Update, Volume 1 – Foreward
- Haworthia Update, Volume 1 – Introduction
- Volume 1, Chapter 1:- Haworthia gracilis, H. cymbiformis and H. cooperi in the greater Baviaanskloof area
- Volume 1, Chapter 2:- Haworthia mucronata and its new variety.
- Volume 1, Chapter 3:- The case of Haworthia incurvula V.Poelln. – an up-date.
- Volume 1, Chapter 4:- Haworthia cooperi and Haworthia bolusii var. blackbeardiana.
- Volume 1, Chapter 5:- The Haworthias of Kaboega.
- Volume 1, Chapter 6:- Summation – and a new solution?
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